8189475881 has 2 divisors, whose sum is σ = 8189475882. Its totient is φ = 8189475880.

The previous prime is 8189475869. The next prime is 8189475913. The reversal of 8189475881 is 1885749818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5794254400 + 2395221481 = 76120^2 + 48941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8189475881 is a prime.

It is a super-2 number, since 2×8189475881² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8189475881.

It is not a weakly prime, because it can be changed into another prime (8189478881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094737940 + 4094737941.

It is an arithmetic number, because the mean of its divisors is an integer number (4094737941).

Almost surely, 2^8189475881 is an apocalyptic number.

It is an amenable number.

8189475881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189475881 is an equidigital number, since it uses as much as digits as its factorization.

8189475881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5160960, while the sum is 59.

The square root of 8189475881 is about 90495.7229983826. The cubic root of 8189475881 is about 2015.6666149006. Note that the first 4 decimals are identical.

The spelling of 8189475881 in words is "eight billion, one hundred eighty-nine million, four hundred seventy-five thousand, eight hundred eighty-one".